Add zygote to the foreground cpuset.

This ensures that newly forked zygote processes will end up
in the corret cpuset.

bug 23751126

Change-Id: I987a2828cf2504963f1317d17f0b51d26cf22a70
diff --git a/rootdir/init.zygote64_32.rc b/rootdir/init.zygote64_32.rc
index 979ab3b..8ed5e9e 100644
--- a/rootdir/init.zygote64_32.rc
+++ b/rootdir/init.zygote64_32.rc
@@ -5,8 +5,10 @@
     onrestart write /sys/power/state on
     onrestart restart media
     onrestart restart netd
+    writepid /dev/cpuset/foreground/tasks
 
 service zygote_secondary /system/bin/app_process32 -Xzygote /system/bin --zygote --socket-name=zygote_secondary
     class main
     socket zygote_secondary stream 660 root system
     onrestart restart zygote
+    writepid /dev/cpuset/foreground/tasks
\ No newline at end of file